Compilare: main.cpp: In function 'void build(int, int, int)': main.cpp:37:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while (i < tree[nod*2].v.size() && j < tree[nod*2+1].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:37:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while (i < tree[nod*2].v.size() && j < tree[nod*2+1].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:51:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | while (i < tree[nod*2].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:53:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | while (j < tree[nod*2+1].v.size()) | ~~^~~~~~~~~~~~~~~~~~~~~~~~